My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8878EUK25
- Part No.:
- MAX8878EUK25
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8878EUK25.pdf
- Description:
- IC REG LINEAR 2.5V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,034
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX8878EUK25 from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 2.5V output, delivering up to 150mA from a 2.5V–6.5V input. It features 30µVRMS output noise, 165mV dropout at 150mA, 100µA operating supply current, and integrated auto-discharge functionality. It serves as a precision power source for battery-powered portable electronics requiring stable low-voltage rails.
For engineers reviewing the MAX8878EUK25 datasheet, MAX8878EUK25 pinout, MAX8878EUK25 application, or MAX8878EUK25 equivalent, key selection criteria include dropout performance at full load, shutdown leakage (<10nA), output voltage accuracy (±1.4%), and BP-capacitor–dependent noise reduction in space-constrained SOT23-5 layouts.
Technical Context
The MAX8878EUK25 uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling low dropout and load-independent 100µA quiescent current-even in dropout. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to OUT.
It integrates reverse-battery protection (limits reverse current to 1mA), thermal shutdown at +155°C with 15°C hysteresis, and a dedicated BP pin for noise filtering via a 0.01µF capacitor. The MAX8878 variant adds active output discharge through a 300Ω internal resistance during shutdown-distinct from the MAX8877.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.4% over -40°C to +85°C - ensures stable core logic or analog sensor biasing without external feedback. |
| Max Output Current | 150mA continuous - supports moderate-power microcontrollers, RF front-ends, or display drivers in handheld devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 2.65V input, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz, CBP = 0.01µF, COUT = 10µF) - suitable for noise-sensitive ADCs, PLLs, or audio codecs. |
| Quiescent Current | 100µA at full load and in dropout - maintains ultra-low standby power without sacrificing regulation performance. |
| Shutdown Current | 10nA typical - enables deep-sleep modes in battery-critical applications like wearables and remote sensors. |
| Auto-Discharge | 300Ω internal discharge path to GND when SHDN = low - prevents residual output voltage from interfering with system reset sequencing. |
Pinout & Package
MAX8878EUK25 is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with exposed pad not electrically connected. The GND pin serves dual roles: circuit return and thermal conduction path - requires soldering to a large PCB copper area for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient suppression. |
| 2 - GND | Ground reference and thermal sink | Must connect to large PCB ground plane to manage power dissipation up to 571mW at +70°C ambient. |
| 3 - SHDN | Active-low enable/disable control | Logic low disables regulation and triggers auto-discharge; tie to IN for always-on operation. |
| 4 - BP | Bypass node for reference noise filter | Connects internally to 200kΩ resistor; 0.01µF ceramic capacitor reduces output noise by forming 80Hz low-pass filter. |
| 5 - OUT | Regulated output terminal | Delivers 2.5V @ ≤150mA; requires ≥1µF ceramic capacitor (ESR < 0.2Ω) for stability with VOUT ≥ 2.5V. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling constant 100µA IQ across load and dropout conditions - extends battery runtime vs. PNP-based regulators. |
| Auto-discharge function | 300Ω internal discharge path actively pulls OUT to GND during shutdown - avoids floating outputs that disrupt downstream logic or cause latch-up. |
| Reverse battery protection | Clamps reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage in consumer devices with user-replaceable batteries. |
| Thermal shutdown with hysteresis | Shuts down at +155°C and re-enables only after cooling by 15°C - provides safe, self-resetting fault recovery during sustained overload or poor heatsinking. |
| BP pin noise filtering | Internal 200kΩ resistor + external 0.01µF capacitor forms dedicated low-pass filter for bandgap reference - achieves 30µVRMS noise without complex external compensation. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor I/O banks and RF transceiver bias rails in GSM/CDMA handsets with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Primary LDO delivering clean 2.5V rail; regulates voltage between battery and sensitive analog/digital blocks. Use Value: 165mV dropout preserves >90% of battery capacity before cutoff; 30µVRMS noise prevents SNR degradation in receiver chain. |
Use Scenario: Providing regulated 2.5V supply to PCMCIA card controllers and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card circuitry from noisy host bus voltage. Use Value: Auto-discharge ensures rapid, controlled power-down during hot-plug removal - prevents data corruption or bus contention. |
| Palmtop Computers | Electronic Planners |
|
Use Scenario: Supplying 2.5V to SRAM, touch controller, and LCD driver ICs in compact palmtop PDAs with tight thermal constraints. IC Role / Device Role / Timing Role: Low-quiescent LDO maintaining system wake-up readiness while minimizing self-discharge during standby. Use Value: 100µA IQ and 10nA shutdown current extend weeks-long battery life in always-on scheduling applications. |
Use Scenario: Powering real-time clock (RTC), memory backup, and button-interface circuitry in low-cost electronic organizers. IC Role / Device Role / Timing Role: Precision voltage source ensuring accurate RTC timing and nonvolatile memory retention. Use Value: ±1.4% output accuracy guarantees stable oscillator bias over temperature - critical for timekeeping drift < 2ppm/°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8877EUK25 | No auto-discharge; identical pinout, specs, and package - differs only in absence of active output discharge path. | Suitable where shutdown discharge is unnecessary or handled externally; lower cost where auto-discharge is unused. | Select MAX8877EUK25 if system-level discharge is managed by MCU GPIO or external FET - avoids paying for unused feature. |
| Torex XC6206P252MR | 2.5V fixed, 150mA, 250mV dropout at 150mA, 45µVRMS noise, no BP pin or auto-discharge - SOT23-5 compatible but different pin mapping (IN/GND/EN/OUT). | Lacks BP noise filtering and active discharge; requires external EN pull-up; higher dropout limits usable battery range. | Choose XC6206P252MR only for cost-sensitive, non-noise-critical designs where board layout allows pin remapping and 250mV dropout is acceptable. |
Compared with MAX8877EUK25, the MAX8878EUK25 adds guaranteed auto-discharge - critical for deterministic power sequencing - while XC6206P252MR trades noise performance and discharge capability for lower unit cost and simpler BOM, but requires layout revision due to non-identical pinout.
Availability
MAX8878EUK25 is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, palmtop computers, and electronic planners requiring stable component supply with guaranteed long-term manufacturability and automotive-grade temperature support (-40°C to +85°C).
Supply support for MAX8878EUK25 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX8877/MAX8878 product line was designed specifically for battery-powered portable electronics demanding ultra-low noise, minimal quiescent current, and robust protection features in ultra-small SOT23-5 packages.
FAQ
What is the output voltage tolerance of the MAX8878EUK25 over temperature and load?
The MAX8878EUK25 delivers 2.5V with ±1.4% accuracy across the full -40°C to +85°C operating temperature range and for output currents from 0.1mA to 120mA. At +25°C and 0.1mA load, tolerance tightens to ±1.4% minimum; worst-case deviation remains within ±3.5% for VOUT < 2.5V conditions per datasheet Electrical Characteristics table.
Does the MAX8878EUK25 require an external capacitor on the BP pin, and why?
Yes - the MAX8878EUK25 requires a 0.01µF ceramic capacitor between BP and GND. This capacitor works with an internal 200kΩ resistor to form an 80Hz low-pass filter that suppresses bandgap reference noise, directly reducing output voltage noise to 30µVRMS. Omitting it increases noise by ~2× and degrades PSRR above 100Hz.
How does the auto-discharge function operate in the MAX8878EUK25 during shutdown?
When SHDN is pulled low, the MAX8878EUK25 activates an internal 300Ω discharge path between OUT and GND. This actively pulls the output voltage to ground within microseconds - unlike passive RC decay - ensuring rapid, predictable power-down essential for clean system resets and avoiding floating node issues in multi-rail systems.
What is the maximum allowable input voltage for the MAX8878EUK25, and what happens beyond that?
The absolute maximum input voltage for the MAX8878EUK25 is +7V applied to the IN pin relative to GND. Exceeding this rating risks permanent damage. Operation above 6.5V - the recommended maximum - degrades long-term reliability and may trigger thermal shutdown prematurely due to excessive power dissipation (P = IOUT × (VIN − 2.5V)).
Can the MAX8878EUK25 be used with ceramic output capacitors, and what ESR is required?
Yes - the MAX8878EUK25 is optimized for ceramic output capacitors. For VOUT = 2.5V, a minimum 1µF X7R/X5R ceramic capacitor with ESR < 0.2Ω is required for stability across -40°C to +85°C. Lower-ESR ceramics improve transient response and PSRR; Z5U/Y5V types may require ≥2× capacitance at cold temperatures to maintain phase margin.
MAX8878EUK25 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX8878EUK25 FAQ
1.How can I place an order for MAX8878EUK25 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8878EUK25 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX8878EUK25 reliable?
The price and inventory of MAX8878EUK25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8878EUK25 is usually 5 days.
3.What payment methods are accepted for MAX8878EUK25?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8878EUK25 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8878EUK25?
MAX8878EUK25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8878EUK25 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX8878EUK25?
For technical support, including MAX8878EUK25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8878EUK25 requirements.
6.How does Aetrix verify that MAX8878EUK25 is sourced from the original manufacturer or authorized distributors?
All MAX8878EUK25 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX8878EUK25 meets industry standards.
7.What is the process for return or replacement of MAX8878EUK25?
All MAX8878EUK25 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8878EUK25, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX8878EUK25 part is unused and in its original packaging.
Return procedure for MAX8878EUK25:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8878EUK25 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
